Physics
Scientific paper
Nov 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....9011067r&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 90, Nov. 1, 1985, p. 11,067-11,074.
Physics
23
Magnetic Flux, Mercury (Planet), Plasma Interactions, Solar Planetary Interactions, Solar Wind Velocity, Interplanetary Magnetic Fields, Magnetic Measurement, Magnetopause, Magnetosheath, Mariner 10 Space Probe, Planetary Magnetospheres, Mercury (Planet), Flux, Mariner 10, Magnetic Properties, Magnetopause, Magnetosheath, Magnetosphere, Comparisons, Thickness, Shape, Analysis, Magnetic Fields, Spacecraft Observations
Scientific paper
An examination of high-resolution Mariner 10 magnetic measurements in the vicinity of the Mercury magnetopause for the three available crossings at high resolution reveals the signatures of what have been called flux transfer events (FTE). These events occur both in the magnetosheath and in the magnetosphere. They last about 1 s and hence have a dimension of about 400 km, or about 5 percent of the width of the Mercury magnetosphere. This relative dimension is similar to that observed at earth, but the repetition rate is about an order of magnitude faster at Mercury. The net amount of flux transfer is much less than that at the earth. It is estimated that less than 1 percent of the available solar wind potential drop is appliefd by FTEs to the magnetosphere of Mercury. Evidence for 'steady state' reconnection is also observed which may apply a potential drop from 5 to 25 kV across the Mercury magnetopause. The magnetopause itself appears to be about 500 km thick. The shape of the magnetopause at the crossing locations can be approximated with a simple rotatinally symmetric conic section, with its focus at the center of the planet and an eccentricity of 0.8.
Russell Christopher T.
Walker Ray J.
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